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Issue 19, 2014
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Chitosan-supported Fe3O4 nanoparticles: a magnetically recyclable heterogeneous nanocatalyst for the syntheses of multifunctional benzimidazoles and benzodiazepines

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Abstract

An environmentally benign and clean biopolymer-based heterogeneous nanocatalyst was prepared and its properties and morphology were characterized using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX) and X-ray diffraction (XRD). Then, its catalytic activity was investigated in two important organic reactions. In these reactions, efficient and selective syntheses of 1,2-disubstituted benzimidazole and 1,5-benzodiazepine derivatives were carried out using 1,2-diamines and aldehydes or ketones in the presence of a catalytic amount of magnetically recoverable chitosan-supported iron oxide nanoparticles (Fe3O4/chitosan), as a biodegradable nanocomposite, in ethanol at ambient temperature in high yields. The Fe3O4/chitosan nanocatalyst can be recovered easily and reused without any significant loss of the catalytic activity.

Graphical abstract: Chitosan-supported Fe3O4 nanoparticles: a magnetically recyclable heterogeneous nanocatalyst for the syntheses of multifunctional benzimidazoles and benzodiazepines

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Publication details

The article was received on 06 Dec 2013, accepted on 22 Jan 2014 and first published on 03 Feb 2014


Article type: Paper
DOI: 10.1039/C3RA47366J
RSC Adv., 2014,4, 9416-9423

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    Chitosan-supported Fe3O4 nanoparticles: a magnetically recyclable heterogeneous nanocatalyst for the syntheses of multifunctional benzimidazoles and benzodiazepines

    A. Maleki, N. Ghamari and M. Kamalzare, RSC Adv., 2014, 4, 9416
    DOI: 10.1039/C3RA47366J

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